Telling the Chicago Sun-Times that he did a session with McCartney "a month and a half ago for a private thing," he added, "I met him once or twice [over the years] to say hello. To spend six or eight hours in studio with him recording! He makes you feel like [you’re recording with just another guy]. He just happens to be a motherf---ing huge talent! Everyone’s in the room at once; you play until you get a good take."

Asked to describe the emotional experience of playing with the former Beatle, Perry responded, "It’s the great ego leveler. I was in the studio with Alice Cooper and Johnny Depp, playing guitar, and the three of us are looking at each other like, hey, we’re sitting here with Paul McCartney! And we’re all looking at each other like open-mouthed kids. Paul was really nice. He’s all about business [when he’s recording]. At 72 he can still hit all those notes."

Of course, now that he's spilled the beans, fans are going to want to hear the results as soon as possible, but Perry refused to offer even a hint of a release date. Promising there would be an announcement when the time is right, he would only add, "It’s a project that we're keeping under wraps for now."